The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.

W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.

Albion Kingpinless Casters by Wheel Size · 6" Wheels · Up to 750 lb · Rubber

Plate sizes: 4-1/2 x 6-1/4, 5 x 7-1/4Bolt holes: 2-7/16 x 4-15/16 slotted to 3-3/8 x 5-1/4; 3-3/8 x 5-1/4 slotted to 4-1/8 x 6-1/8Diameter: 6 inTread: 3 inCapacity: up to 750 lb

Casters on the 4-1/2 x 6-1/4 plate pattern suit heavy industrial carts that tear up kingpin races. Expect wheel diameters 6 in, rubber treads, and capacities 750 lb. Use kingpinless or heavy plate series when shock loads keep shearing kingpin races. When floors see chemicals or washdowns, prefer sealed bearings and non-absorbent wheel compounds. These medium-duty options cover everyday heavy industrial carts that tear up kingpin races without jumping to extreme forged series.